BACCHA. 



35 



the base yellow, its width behind in the male scarcely a third of the length (in the female the third 

 segment may have a yellow mediun stripe) ; fourth segment similar in colour t.o the third, usually with a 

 more or less complete mcdian yellow stripe ; fifth segment of tho female yellowish on the anterior angles ; 

 hypopygium small, shining black. Legs light yellow ; a preapical blackish ring on the hind femora, 

 and a brown or brownish ring on the hind tibiaa ; hind metatarsi elongate, somewhat thickened and 

 infuscated, the terminal joints also somewhat brownish. "Wings nearly hyaline, the stigma lightly 

 brownish. 

 Length 6-7 millim. 



Hab. Mexico, Omilteme in Guerrero 8000 feet (//. H. Smith), Orizaba (//. H Smith 

 and F. D. Godman). 



Four specimens. 



An additional specimcn from Omilteme (male) has the hind legs much more brownish, 

 the hind tarsi brown, the wings tinged with brownish-yellow, the third abdominal 

 segment narrower and more slender. and the fourth segment oval or spatulate in 

 shape. 



9. Baccha nasnta, sp. n., s $ . 



Front of the female moderately broad above, opaque yellow on the sides, in the middle with a broad opaque- 

 black stripe or spot acutely emarginato above and below ; the vertex shining metallic, the lunula shining. 

 Frontal trianglo of the male opaque yellow, with a large opaque black spot. Pace in profile forming 

 nearly a straight line with the front to the oral margin ; the eheeks long and oblique, the head in profile 

 forming nearly an equilateral triangle. Face yellow, the carinate portion somewhat brownish. Meso- 

 notum shining bronze ; the sides, to the suture, the postalar callosities, scutellum, and pleurse light 

 yellow. Abdomen slender, thc third segment cylindrical ; brown, with an oblique lateral spot or 

 V-shaped band on each segment. Lcgs yeUow ; tips of the hind femora and tibiae and the hind tarsi 

 brownish. Wings tingcd with brownish-yellow, the distal portion of the subcostal cell darker, the tips of 

 the marginal and submarginal cells blackish • alulae small. Antennse reddish-yellow ; third joint oval, 

 blackish abovo. 



Length 9 millim. 



Hab. Mexico. 

 Two specimens. 



This species has something of the facies of a Mesogramma, but the ocelli are not 

 placed noticeably forward, and the slender abdomen locates it with Baccha. 



10. Baccha attenuata, sp. n,, <? $ . 



Face, frontal triangle, front of female, antennae, and cheeks light yellow ; front of female very narrow above ; 

 third joint of antennaa orbieuiar ; a minute round blaek dot may be present in the female, just above the 

 antenn33. Thorax light yellow ; mesonotum, except on the lateral margins, bronze-black, with two 

 broad whitish stripes, obsolete posteriorly ; metanotum blackish, the sides of the pectus behind sometimes 

 brownish. Abdomen slender, as long as the wings, brown and yellow, obscurely marked. Wings hyaline ; 

 costal cell yellowish, the subcostal cell dark brown ; tip of marginal and the submarginal cells blackish ; 

 anal cell narrow, the sisth vein markedly concave ; anal angle narrow basally, running to a very acute 

 angle, the lower margin concave on the basal half. Legs yellow. 



Lcngth 8 millim. 



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